120556866 has 16 divisors (see below), whose sum is σ = 241640064. Its totient is φ = 40097904.

The previous prime is 120556847. The next prime is 120556889. The reversal of 120556866 is 668655021.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18921 + ... + 24476.

It is an arithmetic number, because the mean of its divisors is an integer number (15102504).

Almost surely, 2^120556866 is an apocalyptic number.

120556866 is an abundant number, since it is smaller than the sum of its proper divisors (121083198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120556866 is a wasteful number, since it uses less digits than its factorization.

120556866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43865.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 120556866 is about 10979.8390698589. The cubic root of 120556866 is about 494.0042097255.

The spelling of 120556866 in words is "one hundred twenty million, five hundred fifty-six thousand, eight hundred sixty-six".